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Proportional flow control valve
Proportional flow control valve

Proportional 2-way flow control cartridge
◆ direct operated M22 x 1,5
◆ Q = 28 l/min ISO 7789
max
◆ Q N max = 25 l/min x II 2 G Ex db IIC T6, T4
◆ p = 350 bar
max
x II 2 D Ex tb III C T80 °C, T130 °C
x I M2 Ex db I Mb
Class I Division 1
Class I Zone 1

DESCRIPTION APPLICATION
Direct operated, pressure compensated proportional flow control Proportional flow control valves are suitable for precise speed
valve in screw-in cartridge construction for cavity according to ISO control, where the load current has to be maintained constant inde -
7789. With the solenoid deenergised, the control spool is held in the pendent of the input and output pressure. These valves are suitable
closed position by a spring. The change of the electric current is for applications in explosion-hazard areas, open cast and also in
followed by a proportional volume flow change. From the input (1), mines. The screw-in cartridge is perfectly suitable for installation
the fluid flows over a throttle and a control spool to the controlled in control blocks. For machining the cartridge cavity in steel and
output (2). The pressure tight encapsulated Ex-protection solenoid aluminum blocks, cavity tools are available (hire or purchase).
coil prevents an explosion on the inside penetrating to the outside Please refer to the data sheets in register 2.13.
as well as an ignitable surface temperature.

TYPE CODE

Q N B PM22 - - / / - #
Flow control valve
Normally closed

Proportional, Ex-protection execution Ex d
Screw-in cartridge M22 x 1,5

Nominal volume flow rate Q N 3,2 l/min 3,2 16 l/min 16
8 l/min 8 25 l/min 25

Nominal voltage U N 12 VDC G12
24 VDC G24
Ambient temperature up to:
Nominal power P 15 W L15 70 °C
N
17 W L17 70 °C (only UL / CSA)
Certification ATEX, IECEx, EAC, CCC UL / CSA UL MA MA
Australia AU
Sealing material NBR
FKM (Viton) D1
Options without
amplifier M248

Design index (subject to change)
2.6-634

www.wandfluh.com Illustrations are not binding Data subject to change 1/4 Edition: 21 21 2.6-634 E
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